Copy and save the desired icon into a folder on your somputer. (You can do this by left clicking on a picture, choosing Save Picture As... and saving it on your hard drive or to a disk.) Open AOL Instant Messenger and select "My AIM", then "Edit Options", then "Edit Preferences", then click on "Buddy Icons". Search for the icon you saved by clicking "Browse PC". Once you have found it, highlight the icon and click "OK".